Adjuvant Radiotherapy for Epiglottic Carcinoma

Risk-Stratified Dose and Volume Guidelines

The American College of Radiology recommends delivering 60-66 Gy at 2 Gy/fraction once daily to regions with microscopically positive surgical margins and extracapsular nodal extension, with a strength of evidence based on clinical trials 1, 2, 3
Without concurrent chemotherapy, the National Comprehensive Cancer Network suggests targeting 66 Gy specifically, though evidence is limited for this recommendation 2, 4
The American Society for Radiation Oncology emphasizes the importance of completing radiotherapy within 85 days of surgery, as time to completion may be more important than dose itself, with a high level of evidence 1, 3

The American Society of Clinical Oncology recommends delivering 56-60 Gy at 2 Gy/fraction once daily to the tumor bed and involved, dissected lymph node regions, with a moderate level of evidence 1, 2, 5
This applies when perineural invasion, lymphovascular invasion, or close margins are present without frank positive margins, based on clinical guidelines 6, 7

The National Comprehensive Cancer Network suggests treating dissected nodal regions to the same dose as the primary tumor bed based on risk stratification, with a high level of evidence 1, 2
Ipsilateral neck dissection levels should be included in the radiation field for well-lateralized lesions, according to the American Head and Neck Society 8

The American Society for Radiation Oncology recommends 2 Gy per fraction, once daily, 5 days per week, as the standard approach for adjuvant therapy, with a high level of evidence 1, 2, 9
Total treatment time should be minimized, ideally completing within 6-7 weeks from start of radiotherapy, based on clinical trials 1

The American Joint Committee on Cancer mandates concurrent platinum-based chemotherapy with radiotherapy for positive margins, with a high level of evidence 6, 7
The National Comprehensive Cancer Network requires concurrent chemoradiation for >1 mm extracapsular extension or ≥5 positive nodes, with a moderate level of evidence 6, 7

The American Society for Radiation Oncology emphasizes that surgery to completion of RT should be <85 days, as this may be the most critical prognostic factor, with a high level of evidence 1, 2, 3
Elective nodal regions at intermediate/low risk require 44-63 Gy depending on estimated tumor burden, according to the National Comprehensive Cancer Network 9
The American Thyroid Association recommends monitoring TSH every 6-12 months, as hypothyroidism occurs in 20-25% of patients receiving neck irradiation, with a moderate level of evidence 8